Car roof



f A TTORNE YS.

C. D. BONSAI-.L

.. GAR ROOF atout` ovo l, Iz;

' e noon.

application and January 1o, wat. sensi no. aimee.

To aZZ 'whom t may concern.' Y

lBe it known that l, CHARLES DA BoNsALL, a citizen of the United States, and a resident of the city of Pittsburgh, the county of Allegheny and State vof Fenn Sylvania, have invented a certain new and useful Improvement in Car Roofs, of which the following is a specification.

rlhis invention relates principally to car roofs of the all-steel riveted-up type where in self supporting roof sheets span from side plate to side plate and are rigidly secured thereto and to rcarline' members to form a rigid load-sustaining structure. The principal object of the present invention is to pro- .duce a roof that will be stiffer and stronger than previous roofs of the same weight of metal and at the same time facilitate the manufacture and edect greater economy of material. The inventionconsists principally in combining the carlines and roof sheet anges to form weather-proofing seams or joints; and it also consists in the construction and arrangements of parts hereinafter' described and claimed.

In the accompanying drawing wherein like symbols refer to like parts wherever they occur,

v Fig. 1 is a plan view of through one-half of the` roof on the line the seams or joints at the ridge on the line 3-3 in Fig. 1; and

Fig. 4 is a similar cross-section through said seam adjacent' to the'eaves on the line 1 4 in Fig. 1.'

'llhe present roof comprises metal roof' sheets 5 that span lthe car from vside plate 6 to side plate 6 and are rigidly secured to said side plates by rivets 7 The roof sheets 4Slope upwardly fromV eaves to ridge and are providedwith downturned eaves Han es 8 thatoverhang the outer edgesof the side plates. lThe roof sheets are spaced a art along their adjacent side marginsyan be tween the adjacent. marginal portions of successive roof sheets `are disposed relativelyv thick :danged members A whose ends rest on and are rigidly secured vto the respective side plates and function as cai-lines. j

EachJ carline is preferably pressed from `ing flange 17 of the carline reaches the of the lateral `base ange` the, the

part of a cary ying al roof embodying my invention;

Fig. 2 is an enlarged transverse section 4 are preferably curvw `comprises a lll` of me of uniform width and coprises a vertical 'web portion 14 having a lateral angel on its lower edge w wv' on one side of theweb and alateral ll ange 16 on its upper edge disposed onthe opposite side of the web. rlhe oppositely projecting top and bottom flanges 15 and 16 are of the same width and ed continuously from end to end of thecarline. The web 14 of the carline gradually diminishes in depth from its middle toward its end thus. alordmg surplus metal which is 1nl forming a depending ange 17 alon the free marginal edge ofthe lateral top nge 16 of the carline. As the depth of the webv portion 14 of the carline diminishes toward each end thereof, there is a co erm increase, in the depth, of the de l fiange 17 from the middle of the carline ward veach end. At points where the de plane marginal portion of said Hangs 15 ispbent outwardly, forming at each'end of the'carline a lateral base flange 18 which inc in width toward the ends of the carline.

llt is noted that the forming aloml the 16 of the depending dange 17 and the formong the lower edge of the end portions` fr marginaledge of the lateral top of vsaid depeng iiange 17 ofthe .lateral base danges v18, which lie in the-.plane of` the bottom lateral Hangs 15 on dually changesfrom "w `mtially Z- aped section at its .middle into an inve t wl channel-shapedsection jacent to each end having lateral base .1w-.e 15and18. As

vshown in the drawing,z.the en` dsof the-carlines-are preferably provided 'with down- 'turned Hanges 19 that overhang the outer edges 'of' the; side plates; Aand ther inve channel-shaped end' portions of the carlines `down a 1 dly d merge into theplane of the n Hanges 15 and 18 at oints where they are turned down to form t e depending end Hanges 19.

@ne side margin of each roof shmt is preferably formed with a vertical tpstanding e mar jle: l

the opposite side `.of the web 111, results ima car me lwhich Fig. 3 is a cross-section through one of pressed up prefebly vin elo lil@

Y shown in the drawing, the upstanding seam flangep9 at one side margin of a sheetis of substantially uniform depth from ridge to points adjacent to the eaves where its upper edge is curved downwardly in a manner corresponding to the downwardly curved end portions ofthe' carlines and merges into the plane of said sheet at points where its ends are turned down to form the depending eaves flanges 8. The inverted L-shaped seam flange 9 at the other side margin of said sheet is of a depth corresponding substantially vto thedepth of the carlines; and

.i roof sheet is of less width than the width upstandin construction of the carlines; and it is preferable to terminato said lateral flange portion a distance lfrom the eaves ends of ysaid seam flange 25v vcorresponding to the length of its downwardly curved eaves end portions.

`The sheets are placed on the car with the seam flange 9 of one sheet arranged a jacent to the inverted L-shaped kseam ilange 10 of the next adjacent sheet.

The carlines are then placed over the seam flanges 9- and 10 of adjacent sheets with their web portions 14 in contact withn Athe inner face of the flange 9 and'with their lateral ytop'flanges 16 in contact with the lateral top flange of the seam flange 10. The seam ange 9 of one sheet is then secured to the web 14 of-a carline by horizontal rivets 12, and the lateral top flange of the next adj acent sheet is preferably secured to the lateral top flangel of said carline by vertically rivets 13, whereby the sheets and car es are positively secured together to f form a strong and rigid weather-proofing seam or joint construction. The eaves ends of the carlines are rigidly secured to the side plates 6 bythe rivets 7 that secure the eaves ends of lthe roof sheets to said side plates.

A. very im ortant advantage of the roof ereinbefore described is that it permits the use of the carline as an element of a yhollow weather-proofing seam construction.l At the same time, the sheets and carlines are adapted for economical manufacture by reason ofthe mere Hanging operation required in forming the carlines and roof sheets. It is noted as an important advantage of my invention that the carlines and roof sheet,4 flanges cooperateto form a combined carline and.y lseam construction cross-sectional shape at the ridge serves to take care 'of `the verticalfrooic load and whose cross-sectional shape at the eaves serves to take care of the stresses that tend to' rack'and twist'the car body and distort marginal portions lying under an it endwise. This increased strength in the weather proofing seams or joints enables a roof to be produced with sheets and carlines of lighter gauge than would otherwise be practicable.

The invention is not limited to the precise vshapes and arrangements of parts shown and described.

What I claim is:

1. A car roof comprising carline members of substantially Z-shaped section at the middle thereof changing to a channel section towards its ends and root` sheets having their adjacent marginal portions under and rigidly secured to said carline members and formingv in connection therewith hollow weatherproofing seams, the marginal portion of one sheet being L-shaped and secured against the underside of the horizontal portion of the carline, and the marginal portion of the adjacent sheet having a turned-up portion that is secured to the vertical portion of said carline.

2. A car roof comprising carline members of substantially Z-shaped section at its middle portion and roof sheets having flanged secured to said carline members to form in connection therewith hollow weather proofing seams, one flanged portion being disposed vertically and secured by horizontal rivets and the other flanged portion having a horizontal part that is secured by vertical rivets.

3. A car roof comprising carline members of substantially Z-shaped section at its middle portion whose depth diminishes from ridge to eaves and roof sheets having flanged adjacent marginal portions that are below and rigidly secured -to said carline members to form weather-proofing seams whose depth decreases from ridge to eaves.

4. A car roof comprising carline members of substantially Z-shaped section` at its middle changing to channel section towards its ends and roof sheets having flanged marginal portions that are spaced apart underneath said carline members, said marginal ortions being secured to said carline memers to form in connection therewith hollow weather-proofing seams of substantially inverted channel-shaped section.

5. A car roof comprisin carline members each of which has a midd e portion of substantially Z-shaped section and end portions of substantially channel-shaped section, and roof sheets having seam flanges along their adjacent edges with vertical portions that are spaced apart and disposed under said carline members, said carline inembers being rigidly secured to the adjacent seam flanges of successive sheets to form in connection therewith hollow seams of substantially channel-shaped section.

6. A car roof comprisin carline members each of which diminishes ndepth from its lltll miami middle toward 1ts ends and has a middle portion ot' substantially Z-shaped section and end portions of inverted channel-shaped section, and roof sheets having seam flanges along their adjacent side margins with vertical portions that are spaced apart and disposed under said carline members, said carline members being secured to the adjacent seam flanges of successive sheets to form in connection therewith seams of inverted channel-shaped section that diminish in depth from ridge to eaves.

7. A car roof comprising carline members each of which diminishes in depth from its middle toward its ends and has a middle portion of substantially Z-shaped section and end portions of inverted channel-shaped section, and roof sheets having upstanding seam flanges along their adjacent side margins, said flanges being spaced apart and disposed under said carline members, said carline members engaging the adjacent upstanding seam flanges of successive sheets and being rigidly secured thereto to form seams of substantially inverted channelshaped section that decrease in depth from ridge to eaves.

8. A car roof comprising carline members each of which diminishes in depth from its middle toward its-ends and has a middle portion of substantially Z-shaped vsection and end portions of inverted channel-shaped section, and roof sheets having upstanding seam anges along their adjacent side-margins, said carline members covering the adjacent upstanding seam flanges of successive sheets and being rigidly secured thereto to form seams of substantially inverted channel-shaped section that decrease in depth from ridge to eaves, the adjacent seam Hanges of successive sheets being secured one ist to the vertical portion of a carline member and the other to the top of said carline member to form inA connection therewith seams of substantially inverted channel-shaped section.

9. A car roof comprising carline members cach of which diminishes in depth from its middle toward its ends and has a middle portion of substantially Z-shaped section and end portions of inverted channel-shaped section, and roof sheets having upstanding seam flanges along their adjacent side margins, said carline members engaging the adjacent upstanding seam flanges of successive sheets and being rigidly secured thereto to form seams in connection therewith of substantially inverted channel-shaped section that decrease in depth from ridge to eaves, the adjacent seam flanges of successive sheets comprising an upstanding flange portion secured to the vertical portion of a carline member on the inner face thereof and an upwardly and outwardly flanged portion secured to the upper horizontal portion of said carline member on the lower face thereof.

10. A car roof comprising carline members each oi which has a middle ortion of substantially Zshaped section an end portions of substantially inverted channelshaped section that are provided with lateral base flanges, and roof sheets below said carlines and having their adjacent marginal portions flanged upwardly and secured to said carline members to form in connection therewith hollow seams of substantially inverted channel-shaped section, the flanges of adjacent sheets comprising vertical portions that are spaced apart.

Signed at New Kensington, Pa., this 4th day of January, 1923.

CHARLES DAVlD BUNSAlLlL. 

